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How to Fix an Exhaust Manifold Leak on a 460

First produced in 1968, the Ford 460 used a pair of one-piece exhaust manifolds to direct the engines exhaust gases to the exhaust pipes. Between the cylinder head and the exhaust manifold is a gasket designed to prevent exhaust leaks. When the gasket fails, often a puffing sound can be heard as the exhaust gases leak out of the manifold. More often than not, however, the first indication of a manifold leak is the strong odor of dangerous exhaust gases inside the vehicle. For this reason, a new gasket should be installed immediately.

Instructions

1

Remove the exhaust manifolds securing nuts or bolts with a socket wrench and with an open-end wrench. Although the design of the 460s exhaust manifold remained the same throughout its production, there were variations of its fasteners. Some manifolds used only retaining bolts, while others instead featured studs and nuts. With either design, both types of wrenches are necessary to remove the fasteners. Use the open-end wrench to access the fasteners that the socket wrench cannot access.

2

Pull the exhaust manifold off the cylinder head to access the manifolds gasket. Tap on the bottom of the manifold with a rubber mallet to dislodge it if the manifold is stuck.

3

Peel the exhaust manifold gasket off of either the cylinder head or the manifold, depending on which surface the gasket adhered to. The portion of the gasket which failed can be identified by a black burn mark.

4

Position a new exhaust-manifold gasket onto the manifold or, if the engine instead features studs, slide the gasket onto the studs and against the cylinder head. The 460s exhaust-manifold gasket is self-sealing, meaning that gasket sealant must not be applied to the gasket.

5

Place the exhaust manifold against the cylinder head, then tighten the exhaust manifolds fasteners to between 30 and 35 ft-lbs. of torque with a torque wrench.